In order to solve the problem of queuing to buy tickets, no change and waste a lot of valuable time, the electronic ticket system based on QR code identification technology is designed in this paper. The system archit...
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The movement reflects the health of dairy cows. In this paper, each cattle installs wireless sensor nodes in their neck to collect information about the position of the cows. In order to avoid the influence of the env...
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In this paper, indirect adaptive sliding mode control schemes are developed to solve the robust fault tolerant control (FTC) design problem of actuator fault and perturbation compensations for linear time-invariant sy...
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ISBN:
(纸本)9781479987313
In this paper, indirect adaptive sliding mode control schemes are developed to solve the robust fault tolerant control (FTC) design problem of actuator fault and perturbation compensations for linear time-invariant systems. While both eventual faults on actuators and perturbations are unknown, the adaptive schemes are addressed to estimate the upper bounds of perturbations online, as well as to estimate control effectiveness on actuators. Thus, on the basis of the information from adaptive schemes, an adaptive sliding mode controller is designed to compensate the effects of faults and perturbations automatically. According to Lyapunov stability theory, it is shown that both the reachability of sliding surfaces and the stability of sliding mode dynamics can be ensured even in the presence of actuator faults and disturbances. Moreover, the adaptive sliding mode control can reduce the phenomenon of chattering. An example is provided to further illustrate the fault compensation effectiveness.
In order to achieve high voltage, high-power,two-level inverter need to switch in series which results switch static, dynamic-pressure problems. Three-level inverter solve this problem for its circuit, but this circui...
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As we all know, rigid structure is the universal form of robots. They can be controlled accurately, but are not suitable enough for applying in rehabilitation, especially for hands. Human's hands have some complic...
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ISBN:
(纸本)9781479970995
As we all know, rigid structure is the universal form of robots. They can be controlled accurately, but are not suitable enough for applying in rehabilitation, especially for hands. Human's hands have some complicated patterns of movement and narrow joint range of motion, so rigid accessory equipment may cause secondary injury. For the purpose of avoiding this potential risk, the idea of applying soft structure to hand rehabilitation robot is presented in this paper. The soft robot is a new research direction in the field of robot industry, especially in rehabilitation. The soft actuator we presented is made of liquid silicone and thread, and can be tied to the back of human's hands. When it is inflated or deflated, a bending and stretching motion of hands follow with the deformation of soft actuators. It works by deforming repeatedly. The soft actuator has some advantages such as portable, lightweight, low-cost, safe, low-impedance and so on. It works well by the cooperation of vacuum pump which can provide incessant air and solenoid valve which is used for reversing. In the whole system, force sensing resistor and bending sensor are used in the experiments. In order to prove that the soft actuator can work smoothly, we had a test to explore the relationship between air inflow and bending angle. The result that their relationship is close to a straight line means controlling easily and working well. Beacons of these advantages the soft robots have, a wide application prospect in rehabilitation or other fields is available.
The deformation analysis of explosion vessel is very important in strength analysis and engineering design. By means of laser Doppler measurement and Wigner-Ville distribution, the expansion process of steel explosion...
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With the development of LED technology, the actual demand of the people for the smart home lighting, this paper designed a multiple lamps for indoor wireless remote control dimmable LED lighting systems. LED driver is...
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In order to solve the parking problems in cities which has loomed large, a vehicle detector applied digital three-axis AMR sensor HMC5843 for parking is proposed in this paper. The application of wireless sensor netwo...
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This paper mainly uses ABAQUS Explicit finite element analysis to establish a two-dimensional model about the micro cutting process of Guide abrasive wear. The Johnson-Cook constitutive model is used to simulate the s...
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ISBN:
(纸本)9781479939800
This paper mainly uses ABAQUS Explicit finite element analysis to establish a two-dimensional model about the micro cutting process of Guide abrasive wear. The Johnson-Cook constitutive model is used to simulate the stress changes in the process of guide wear. Simplify the particle as a circular, like a small tool to cut the surface of the guide rail. Treating the particle radius as the corner radius, we study the impact on the stress of the guide rail wear process in different cutting speed and radii. The simulation data is obtained by orthogonal cutting experiment and regression model is analyzed by MATLAB, the regression equation and the influence laws of various factors to the stress changes are acquired.
Spherical amphibious robots, as a kind of novel robot, are being studied by researchers. Underwater analysis is an important field in underwater robot research. Underwater movement of the robot which this article ment...
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Spherical amphibious robots, as a kind of novel robot, are being studied by researchers. Underwater analysis is an important field in underwater robot research. Underwater movement of the robot which this article mentioned is accomplished by interaction of servo motor and hydraulic motor. This paper presents the investigation of hydrodynamic performance of spherical amphibious robot with two essential motions, vertical motion and horizontal motion. Gambit 2.4.6 is employed to establish the 3D models and mesh. Meanwhile, simulation calculation and analysis of two models is implemented by Computational fluid dynamics (CFD) code, FLUENT 6.3.26. Finally, the velocity vectors, pressure contours, drag coefficient as well as force report for two states of motion are gained. Resistance of the report data shows that the robot is mainly subjected to differential pressure resistance.
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